Metal & Mining
| Mon 05 Jan 2026
Beijing, Jan. 5 -- Beijing China Coal Mine Engineering has applied Chinese patent for Deep Large-diameter Multi-empty-hole Straight-hole Slotting Method. Huang Baolong, Fu Cai, Yang Yang, Dong Shizhuo, Peng Fei, Sun Jia, Wang Xiang, Zhang Fujian, Wei Kedong, Wang Heng, Jung Sang-yong, Wang Kang and Zhang Jiheng developed it.
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